Sewing-machine



(ModeL) 4 Sheets-Sheet 1. P. DIEHL.

SEWING MACHINE.

No. 347,776. Patented Aug. 24,1886.

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SEWING MACHINE.

No. 347,776. Patented Aug. 24, 1886.

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SEWING MACHINE.

No. 347,776. Patented Aug. 24, 1886.

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SEWING MACHINE.

N0. 347,776. Patented Aug. 24, 1886.

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UNITED STATES PATENT @rrrca.

PHILIP DIEHL. OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGLE MANUFACTURING COMPANY OF NE\V JERSEY.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 347,776, dated August 24,1886.

ADplicai/i0n filed October 8, 1885. Serial No. 179.2-5.

(MudeL) To all whom it may concern..-

Be it known that I, PHILIP DTEHL, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in SewingMachines, of which the following is a specification, reference being had therein to the accompanying drawings.

The object of my invention is to provide a simple and compact sewing-machine capable of running at avery high speed, and also preferably capable of trimming off the edges of the work simultaneously with the sewing.

In order that my invention may be fully understood by others, I will now describe the same in connection with the accompanying drawings, in which- Figure 1 is a side elevation of a machine embodying'my invention. Fig. 2 is a front view of the same. Big. 3 is a sectional elevation on line 3 3, Fig. 4, looking in the direction indicated by the arrows adjacent to said line. Fig. 4 is a plan view of the lower part of the machine with the woik-plate removed and the frame in section. Fig. 5 is a detail view of the feed-bar; and Fig. 6 is a detail cross-section of the feedbar and rock-shaft arm on line 6 6, Fig. 4. Fig. 7 isadetail perspective view of the feeding mechanism, and,

Fig. 8 is a partiil section of the same on line 3 3, Fig. 4, looking in the direction opposite to that indicated by the arrows adjacent to said line.

A denotes the frame of the machine, saidframe being compact, as shown, and preferably cast in one piece.

I) is the work-plate, secured to the frame, and O is the driving-shaft, journaled in the lower part of the frame and having thereon a fly and pulley wheel, D, provided with a crank-pin, d, connected by a pitman, d, with the rear arm, 6, of a rock-shaft, E, pivoted by center screws, 6*, to the upper part of the frame A. The shalt E is provided at its forward end with an arm, 6, on the side of said shaft opposite to the arm e, so that said shaft will be evenly balanced, the said arm 6' being connected by a link, e to a block. f, attached to the needle-bar F. The arms of the rockshaft E are preferably formed integral there with, and the said shaft is of less length than the distance between the inner sides of the end walls of the frame A, so that said shaft, with its integral arms, may be readily placed in its working position in assembling the parts of the machine. To give steadiness to the shaft E the frame A is provided with thickened portions, through which the center screws, 6", pass.

Secured to the driving-shaft O is an ccceutrie, c, surrounded by a strap or yoke, c, said yoke having vertical and horizontal arms 0 and 0, respectively.

G is a rock-shaft, pivoted by center screws to standards a on the frame A, said shaft hav-. ing an arm, 9, jointed to the vertical arm 0 of the eccentric yoke c, and a second arm, 9, which is grooved (see Fig. 6) to receive the feed-bar H, provided with the feed-dog h.

To the arm is attached a small hook, 9 extending across the feed bar H, and serving to hold the latter in the groove of the said arm, so that the downward movements of the bitter will be imparted positively to said bar.

Between depending lugs on the arms 1 and gof the rock-shaft G is pivoted a feed-rocker, I, having an arm, i, connected by a link or pitman, i, to the horizontal arm 0 ofthe yoke c, said rocker having a second arm, i provided with a pin; 1', which is engaged by a hook, h, on the feed-bar H. The rocker I is preferably pivoted on a small rod, 1', passing centrally through said rocker and supported by the arms 9 and g of the rock-:haft G. Thus as the arm i" vibrates horizontally its movements will be imparted to the feedbar to give horizontal or feeding movements to the latter.

To provide means for regulating the horizontal movements of the feed-bar the pin i may be carried by a yoke, i, vertically adjustable on the arm i and secured in any desired position by thumb-screw i passing through the pin 2', and impinging against the arm i. By moving the pin and yoke upward or away from the rocker I the horizontal throw of the feed-bar will be increased, and by moving said pin and yoke in the opposite direction the throw of the fecd'bar will be lessened, as will be obvious.

In connectionwith the mechanism above described I prefer to use a trimming mechanism actuated from the feed-operating eccentric. To this end I provide the arm 9 of the rockshaft G with a head, 9, carrying aknife, J, which is adjusted to out against a bed or cutting-block,K, resting on a solid support alfordcd by the post a ofthe frame A.

L is an ordinary \VillccX & Gibbs rotary hook or looper cooperating with the needle to form chain-stitches, and when this hook is used I prefer to employ a light check-tension, M, an automatic tension, N, and a light automatic check-tension, 0. These tension devices need not beherein particularly described, as they are not herein claimed, but are embraced by my application No. 179,287, filed simultaneously herewith.

The trimming mechanism herein shown is not claimed in this application, excepting in combination with the feeding mechanism, this trimming mechanism being embraced by my application No. 179,286,0f even date herewith.

The operation of my machine will be readily ily understood from the foregoing. Motion being imparted to the drivingshaft, the needlebar rock-shaft E, connected therewith,w ill impart vertical movements to the needle-bar, and the needle carried by the latter with the co operating rotary hook L will form chain-stitches in the usual manner. As the driving-shaft C rotates, the eccentric c thereon will impart a circular movement to the yoke c, the

vertical movements of said yoke being imparted to the arm 9 of the rock-shaft G. and through the latter to the arm 9, which carries the feed'bar H. Thus the feed-bar will be positively raised and lowered, and between each up-and-down movement the said bar will be caused to slide horizontally in its grooved carrying-arm g by reason of the vibrating movements of the feed-rocker I, with which said bar is connected, as above described. As the feedrocker I is connected to the horizontal arm a of the yoke c, which is at a right angle, or nearly so, to the part of said yoke to which the arm 9 of the rockshaft G is jointed, it results that the said rocker is nearly stationary during the intervals when the said yoke is operating the rockshaft G to impart vertical movements to the feedbar, so that horizontal movement of the latter is nearly suspended momentarily, and likewise the rock-shaft G is nearly stationary (causing the vertical movement of the feed-bar to be nearly suspended) during the intervals when the feedrocker is vibrating to move the said feed-bar horizontally.

It will thus be apparent that by the abovedcscribed connections of the feed-bar with the eccentric c, I am enabled to impart positive four-motioned movements to the latter in all directions and to regulate these movements as may be desired. As the trimming-knife J, which receives movements from the feed-operating eccentric, is caused to descend simultaneously with the feed-bar, it follows tliattlie trimming will be effected between the feeding movements of the feed-bar.

By virtue of the compact arrangement of the parts herein shown, the evenly-balanced needle bar-operating rock-shaft and the positive feeding mechanism, my machine is adapted for very high rates of speed, having been tested to sew at a speed exceeding four thousand stitches per minute.

I claim as my invention-- 1. In a sewing-machine, the combination, with a driving-shaft carrying an eccentric, of a yoke surrounding the latter, a rock-shaft having two arms, one of which is connected with said yoke, a feed-bar supported by and adapted to slide on the other of said arms, a feed-rocker supported by the arms of said rock-shaft and connected with said feed-bar, and a link jointed to an arm of said feedrocker and to the said yoke, substantially as set forth.

2. In a sewing-machine, the combination, with a driving-shaft provided with an eccentric, of a yoke surrounding the latter, a rockshaft and a feed-rocker having connections with said yoke, said connections being at a right angle,or approximately so,to each other, and a feed'bar connected with said rocker and adapted to slide on an arm of the said rockshaft, substantially as set forth.

3 In a sewing-machine, the combination, with a driving-shaft provided with an eccentric, of a yoke surrounding the latter, a rockshafthaving two arms, one of which is connected with said yoke, and the other of which is grooved, a feed-bar adapted to slide in the latter arm, and provided with a hook, a feedrocker having two arms, a link connecting one ofsaid arms to the said yokeand an adjustable pin carried by the other of said arms and en- .gaged by the said hook on the feed-bar, substantially as set forth.

4. In a sewing-machine, the combination, with a feeding mechanism and a trimming mechanism, of a single eccentric serving to operate both of said mechanisms, and a shaft by which said eccentric is carried,substantially as set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

BIIILIP DIEHL.

Vitnesses:

JAMES G. GREENE, WM. H. DUsLEE. 

